<!DOCTYPE html>
<html lang="zh-cn">
    <head>
        <meta charset="UTF-8"/>
        <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
        <title>Document</title>
        <style>
            .spinner {
              margin: 100px auto;
              width: 20px;
              height: 20px;
              position: relative;
            }
             
            .container1 > div, .container2 > div, .container3 > div {
              width: 6px;
              height: 6px;
              background-color: #333;
             
              border-radius: 100%;
              position: absolute;
              -webkit-animation: bouncedelay 1.2s infinite ease-in-out;
              animation: bouncedelay 1.2s infinite ease-in-out;
              -webkit-animation-fill-mode: both;
              animation-fill-mode: both;
            }
             
            .spinner .spinner-container {
              position: absolute;
              width: 100%;
              height: 100%;
            }
             
            .container2 {
              -webkit-transform: rotateZ(45deg);
              transform: rotateZ(45deg);
            }
             
            .container3 {
              -webkit-transform: rotateZ(90deg);
              transform: rotateZ(90deg);
            }
             
            .circle1 { top: 0; left: 0; }
            .circle2 { top: 0; right: 0; }
            .circle3 { right: 0; bottom: 0; }
            .circle4 { left: 0; bottom: 0; }
             
            .container2 .circle1 {
              -webkit-animation-delay: -1.1s;
              animation-delay: -1.1s;
            }
             
            .container3 .circle1 {
              -webkit-animation-delay: -1.0s;
              animation-delay: -1.0s;
            }
             
            .container1 .circle2 {
              -webkit-animation-delay: -0.9s;
              animation-delay: -0.9s;
            }
             
            .container2 .circle2 {
              -webkit-animation-delay: -0.8s;
              animation-delay: -0.8s;
            }
             
            .container3 .circle2 {
              -webkit-animation-delay: -0.7s;
              animation-delay: -0.7s;
            }
             
            .container1 .circle3 {
              -webkit-animation-delay: -0.6s;
              animation-delay: -0.6s;
            }
             
            .container2 .circle3 {
              -webkit-animation-delay: -0.5s;
              animation-delay: -0.5s;
            }
             
            .container3 .circle3 {
              -webkit-animation-delay: -0.4s;
              animation-delay: -0.4s;
            }
             
            .container1 .circle4 {
              -webkit-animation-delay: -0.3s;
              animation-delay: -0.3s;
            }
             
            .container2 .circle4 {
              -webkit-animation-delay: -0.2s;
              animation-delay: -0.2s;
            }
             
            .container3 .circle4 {
              -webkit-animation-delay: -0.1s;
              animation-delay: -0.1s;
            }
             
            @-webkit-keyframes bouncedelay {
              0%, 80%, 100% { -webkit-transform: scale(0.0) }
              40% { -webkit-transform: scale(1.0) }
            }
             
            @keyframes bouncedelay {
              0%, 80%, 100% {
                transform: scale(0.0);
                -webkit-transform: scale(0.0);
              } 40% {
                transform: scale(1.0);
                -webkit-transform: scale(1.0);
              }
            }
        </style>
    </head>
    <body>
        <h1>使用 CSS3 实现超炫的 Loading（加载）动画效果</h1>
        <p><a href="http://www.cnblogs.com/lhb25/archive/2013/12/28/loading-spinners-animated-with-css3.html">来源</a></p>
        <div class="spinner">
          <div class="spinner-container container1">
            <div class="circle1"></div>
            <div class="circle2"></div>
            <div class="circle3"></div>
            <div class="circle4"></div>
          </div>
          <div class="spinner-container container2">
            <div class="circle1"></div>
            <div class="circle2"></div>
            <div class="circle3"></div>
            <div class="circle4"></div>
          </div>
          <div class="spinner-container container3">
            <div class="circle1"></div>
            <div class="circle2"></div>
            <div class="circle3"></div>
            <div class="circle4"></div>
          </div>
        </div>

    </body>
</html>